Hi Walter,
Regarding you question
What bad things happen if BIRD 166.3 is included in IBIS 7.0?
That's exactly what I answered in the doc I sent earlier, which shows how your
BIRD166 flow erroneously amplifies redriver nonlinearity (e.g. limiting mode
and compression), internal device noise and xtlk. The erroneous amplification
equals the upstream channel loss in dB. For instance, if the upstream channel
loss is 20dB, the amplification is 20dB.
Fangyi
From: ibis-macro-bounce@xxxxxxxxxxxxx<mailto:ibis-macro-bounce@xxxxxxxxxxxxx>
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of ;
fangyi_rao@xxxxxxxxxxxx<mailto:fangyi_rao@xxxxxxxxxxxx>
Sent: Monday, May 8, 2017 4:17 AM
To: wkatz@xxxxxxxxxx<mailto:wkatz@xxxxxxxxxx>;
ibis-macro@xxxxxxxxxxxxx<mailto:ibis-macro@xxxxxxxxxxxxx>
Subject: [ibis-macro] Re: Fangyi and I had an AR to describe what bad things
can happen if IBIS 166.2 is approved in 7.0 and the Keysight BIRD with
additional IR is approved in IBIS 7.1 ...
(Resend with typo fixed)
All,
In the attached doc I showed that the BIRD166 flow may unphysically amplify
redriver nonlinearity, internal noise and crosstalks when they reach downstream
DFE and that this amplification equals the upstream channel loss in dB. This
problem can't be resolved by incremental changes in current flow. That's why
additional columns are added to impulse response matrix in the Keysight BIRD.
BTW, there is no need to count the number of possible combinations. As more
aggressors and cascaded redrivers are added to the link, this number will keep
growing. The flow in the Keysight BIRD, described in a separate doc, is
designed in a scalable way so that one only needs to deal with 4 basic
combinations and all others are automatically covered.
Fangyi
From: ibis-macro-bounce@xxxxxxxxxxxxx<mailto:ibis-macro-bounce@xxxxxxxxxxxxx>
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz
Sent: Wednesday, May 03, 2017 11:40 AM
To: IBIS-ATM <ibis-macro@xxxxxxxxxxxxx<mailto:ibis-macro@xxxxxxxxxxxxx>>
Subject: [ibis-macro] Fangyi and I had an AR to describe what bad things can
happen if IBIS 166.2 is approved in 7.0 and the Keysight BIRD with additional
IR is approved in IBIS 7.1 ...
All,
Fangyi and I had an AR to describe what bad things can happen if IBIS 166.2 is
approved in 7.0 and the Keysight BIRD with additional IR is approved in IBIS
7.1.
I am enclosing a presentation which is a short review of the current IBIS
166.2, and adds a section demonstrating that no bad things will happen if 166.2
is included in IBIS 7.0 and the Keysight BIRD with additional IR is approved in
IBIS 7.1.
In summary:
* There are 81 possible flows based on IBIS 6.1 models.
* There are 625 possible flows in the Keysight BIRD.
* The 81 flows in IBIS 7.0 remain the same in IBIS 7.1.
Therefore the flows in IBIS 7.1 will not change any of the flows in IBIS 7.0.
Walter
Walter Katz
wkatz@xxxxxxxxxx<mailto:wkatz@xxxxxxxxxx>
Phone 303.449-2308
Mobile 303.335-6156
